 /*******************************************************************************
  * Copyright (c) 2000, 2007 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.core.internal.filebuffers;

 import org.osgi.framework.Bundle;

 import org.eclipse.core.runtime.Assert;
 import org.eclipse.core.runtime.Platform;
 import org.eclipse.core.runtime.Plugin;

 import org.eclipse.core.filebuffers.ITextFileBufferManager;



 /**
  * The plug-in runtime class for the file buffers plug-in (id <code>"org.eclipse.core.filebuffers"</code>).
  *
  * @since 3.0
  */
 public class FileBuffersPlugin extends Plugin {

     public final static String PLUGIN_ID= "org.eclipse.core.filebuffers"; //$NON-NLS-1$

     /** The shared plug-in instance */
     private static FileBuffersPlugin fgPlugin;
     /** The file buffer manager */
     private ITextFileBufferManager fTextFileBufferManager;

     /**
      * Creates a plug-in instance.
      */
     public FileBuffersPlugin() {
         Assert.isTrue(fgPlugin == null);
         fgPlugin= this;
     }

     /**
      * Returns the shared instance.
      *
      * @return the default plug-in instance
      */
     public static FileBuffersPlugin getDefault() {
         return fgPlugin;
     }

     /**
      * Returns the text file buffer manager of this plug-in.
      *
      * @return the text file buffer manager of this plug-in
      */
     public synchronized ITextFileBufferManager getFileBufferManager() {
         if (fTextFileBufferManager == null) {
             Bundle resourcesBundle= Platform.getBundle("org.eclipse.core.resources"); //$NON-NLS-1$
 if (resourcesBundle != null)
                 fTextFileBufferManager= new ResourceTextFileBufferManager();
             else
                 fTextFileBufferManager= new TextFileBufferManager();
         }
         return fTextFileBufferManager;
     }
 }

